Answer
I think it might be B
Explanation
A catalyst will speed up the activation energy and therefore speed up the reaction. The products will form fast because of this.
Noble gas. Noble gas, any of the seven chemical elements<span> that make up Group 18 (VIIIa) of the </span>periodic table<span>. The </span>elements<span> are </span>helium<span> (</span>He<span>), </span>neon<span> (</span>Ne<span>), argon (Ar), krypton (Kr), </span>xenon<span> (</span>Xe<span>), radon (Rn), and oganesson (Og)</span>
100 grams of solute would be present as 20% of 500 is 100
